Eidmanacris larvaeformis ( Chopard, 1938 )

Nihei, Silvio S., 2017, Taxonomic review of Eidmanacris Chopard, 1956 (Orthoptera: Grylloidea: Phalangopsidae), Zootaxa 4321 (1), pp. 1-93 : 11-15

Eidmanacris larvaeformis ( Chopard, 1938)

( Figs. 6–8 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:28472

Eidmanniella larvaeformis Chopard, 1938: 159 (male and female description). Type locality: Brazil, state of Rio de Janeiro, municipality of Mendes.

Eidmanacris larvaeformis, Chopard, 1956: 254 (new combination); Chopard, 1968: 278 (catalogue); Prado & Fontanetti, 2005: 83 –87 (morphology of the metanotal gland); Souza-Dias, Campos & Nihei, 2015: 555 (note).

Type material examined. Holotype male, allotype, 1 male paratype, 1 female paratype (MNHN). Holotype male labeled “Dr. Eidmann legit”; “Mendes, E. d. Rio. Brazilien, IX. IX.1933 ”; “ Eidmanniella larvaeformis Chopard det.”; “MNHN-EO-ENSIF3925”. Allotype labeled “ Mendes, Rio de Janeiro, 4.IX–24.X.1933, Eidmann ”; “ Eidmanniella larvaeformis allotype , Chop. ”; “MNHN-EO-ENSIF3926”. Paratype labeled “ Dr. Eidmann legit”; “ Mendes, E. d. Rio. Brazilien, IX. IX.1933 ”; “ Eidmanniella larvaeformis TYPE Chop.”; “Elytre droite – Metanotum PHOTOS SEM 20–26/27–34, 54–57”. Dry specimens.

Other material examined. Total: 19 males, 14 females and 3 nymphs. 1 male and 1 female labeled: “ Brasil, RJ, Nova Friburgo , Macaé de Cima , Pousada Amantes da Natureza , Margem esquerda do Rio Macaé, 23/ix/2015, T.P.L. Pereira col.” ( MZSP) ; 6 males and 6 females, labeled: “ Brasil, RJ, Rio das Ostras, Distr. Rocha Leão, i-1996 (22 Km NW Casemiro de Abreu), 22°26’86’’S// 42°03’35’’W, F.A. G. Mello—S. S. Nihei leg.” ; 6 males and 7 females labeled: “ Ilha do Araújo , Brasil, Parati—RJ, 15/vi/1996, F.A.G. de Mello &J. Justi Jr. Col. ” ; 9 males and 2 females labeled: “ Brasil, Sp , Ubatuba , Picinguaba (mata), 10–11.IX.1985, F.A. G. de Mello—L. Jacomini, leg.; “ Brasil, RJ, Angra dos Reis, 05–06.x.1996, 23°00’32’’S // 44°18’46’’W, F.A. G. Mello—A. S. Jim, leg. Mata ” ; 1 male and 1 female labeled: “ Brasil, RJ, Seropédica, Floresta Nac. “ Mário Xavier ”, 07–09.x.1996 (Mata), 22°44’04’’S // 43°42’48’’W, F.A. G. Mello—A. S. Jim ” ( UBTU). Specimens preserved in ethanol 80%.

Distribution. Brazil, states of Rio de Janeiro and São Paulo.

Diagnosis. This species can be distinguished from other Eidmanacris by the following characters: first c.a. 35 antenomeres dark brown, remaining antenomeres whitish; male FWs triangular; lateral projections of metanotal gland cylindrical and parallel; superior projection of pseudepiphallic arm upcurved, internal projection longer than superior, finger-shaped; inferior projection very short; PsP2 curved outwards, in dorsal view; sclerite A sinuous in dorsal view.

Redescription. Head. Reddish brown. Occiput reddish brown with central, light brown band, from occiput to margin of each eye; vertex light to medium brown, with three light brown longitudinal lines, in dorsal view ( Fig. 6C ). Fastigium reddish brown, apically dark, with two rows of bristles, slightly longer than wide, slightly narrowed toward the apex, separated from vertex by line forming “V” ( Fig. 6C ). Frons light brown, with three dark brown vertical bands, two below eyes, another above clypeus ( Figs. 6A, B ). Three ocelli present, well developed, forming isosceles triangle, central one flattened at bottom, lateral ones elliptical ( Figs. 6A, B, C ). Eyes with unpigmented small area on supero-internal angle ( Fig. 6C ). Maxillary palpi medium brown, long and thin, slightly pilose, distal portion of joints whitish; joints 3, 4 and 5 almost same-sized ( Fig. 6H ); apex of joint 5 upcurved. Gena light brown, posterior margin medium brown in lateral view ( Fig. 6B ). Frontoclypeal suture dark yellow; clypeus light brown, dark on lateral; labrum whitish, lower portion light brown. Mandible light brown, inner margin medium to dark brown. Antennal scape inner half light brown, outer half dark brown ( Fig. 6A ); first c.a. 35 antenomeres dark brown, posterior antenomeres whitish.

Thorax. Pronotum DD wider than long, reddish to medium brown, with sparse, dark spots and maculae, slightly pubescent, inflated, divided by tiny light brown sagittal line ( Fig. 6C ); DD cephalic margin nearly straight and caudal margin slightly concave ( Fig. 6C ); ventro-cephalic angle rounded, ventro-caudal margin gradually ascendant ( Fig. 6B ).

Legs. FI and II dark yellow, annulated with dark brown. TI and II dark yellow, TI with two same-sized apical spurs; TII with two inner apical spurs and one outer, smaller. FIII light yellow, with thin, medium brown stripes on outer surface, apical third medium brown ( Fig. 6D ). TIII yellowish brown; subapical spurs 4/4, with serrulation above and between subapical spurs, except between two distal ones; apical spurs 3/3, more developed on inner surface: dorsal (iad) and median one (iam) sub-equal, ventral smallest (iav) (iam>iad>iav); outer apical spurs: median one longer (oam), dorsal sub-equal to oam in length (oad), ventral smaller (oav) (oam>oad>oav). Basitarsi I, II and III yellowish.

Abdomen. Sub-cylindrical in dorsal view, reddish to dark brown, marbled, divided by light brown sagittal line.

Male. Medium to large sized body, general coloration medium brown to dark brown, marbled. FWs medium brown, inner margin light brown, short, apex sub-triangular; posterior part of inner margin and apex whitish, connected to a single vein that divides the external part of FW as lateral field, glandular thickening present distally ( Fig. 6C ); inner margins not touching each other; FW covering metanotal gland, not surpassing metanotum posterior border ( Figs. 6B, C ). Metanotal gland present, anteromedian crest forming an inverted triangle with cluster of bristles; lateral projections short, cylindrical, parallel ( Figs. 6F, G ). Supra-anal plate medium to dark brown, slightly pubescent; anterior margin slightly concave, lateral-posterior projections very short, medium brown; posterior margin sub-straight ( Fig. 6I ). Subgenital plate longer than wide, with lateral pubescence, laterally medium brown and centrally whitish; anterior margin almost straight, posterior margin rounded with central invagination small ( Fig. 6K ).

Phallic complex ( Figs. 7A–C ; 8A–C). Pseudepiphallus: base of pseudepiphallic sclerite central part slightly narrow, in dorsal view; pseudepiphallic arms sclerotized, hard, upcurved in lateral view; apex of pseudepiphallic arm with bristles, superior projection folded to dorsal; supero-internal projection longer than superior, fingershaped; inferior projection very short; anterior projection of pseudepiphallic sclerite present, very short, not surpassing base of pseudepiphallic sclerite; PsP2 hardly sclerotized, surpassing posterior extremity of pseudepiphallic arms, in dorsal view; apex pointed in lateral view, curved outwards in dorsal view, with membranous sphere on inner surface; sclerite A connected with base of pseudepiphallic sclerite, sinuous in dorsal view, articulated with PsP2, no visible connection between them; PsP1 elongate, inner surface well sclerotized, in ventral view. Ectophallic invagination: ectophallic apodeme short; ectophallic arc located posteriorly to base of pseudepiphallic sclerite, in dorsal view; ventro-posterior projection elongate; dorsal projections sclerotized, short, laterally rounded, posterior margin forming central concavity. Endophallus: median-posterior projection of endophallic sclerite elongate, not surpassing PsP2 apex; lateral-posterior lobes of endophallic sclerite elongate; endophallic apodeme not so elongate, as for the genus.

Female. Larger than male, general coloration similar ( Fig. 6E ). Supra-anal plate medium brown, posterior border dark brown, anterior margin concave, posterior margin slightly rounded with long bristles ( Fig. 6J ). Subgenital plate light to medium brown, wider than long, anterior margin nearly straight, posterior margin with tiny central concavity ( Fig. 6L ). Ovipositor as in figs. 6M, N.

Copulatory papilla ( Figs. 8D–F ). Slightly longer than wide, flattened dorso-ventrally in lateral view, anterior margin membranous, posterior margin unpigmented, pointed centrally.

Remarks. Specimens from different localities vary widely in size.

Measurements (mm). Male (n=6): Hw, 3.33 ± 0.08 (3.22–3.41); iod, 1.68 ± 0.06 (1.61–1.8); Lpron, 4.27 ± 0.13 (4.15–4.46); awpron, 3.49 ± 0.17 (3.22–3.66); pwpron, 4.07 ± 0.11 (3.09–4.15); wpron, 5.15 ± 0.11 (5.02– 5.27); LFW, 2.26 ± 0.25 (1.98–2.54); wFW, 1.56 ± 0.06 (1.49–1.67); LFIII, 17.37 ± 0.52 (16.8–17.85); wFIII, 3.52 ± 0.15 (3.45–3.68); LTIII, 18.78 ± 0.59 (18.15–19.65); Ltars 1-III, 5.7 ± 0.35 (5.25–6).

Female (n=7): Hw, 3.39 ± 0.39 (3.22–3.59); iod, 1.61 ± 0.06 (1.48–1.67); Lpron, 3.92 ± 0.23 (3.72–4.27); awpron, 3.48 ± 0.19 (3.22–3.72); pwpron, 4.01 ± 0.2 (3.78–4.27); wpron, 4.88 ± 0.35 (4.4–5.39); LFIII, 16.47 ± 1.13 (15.15–18.3); wFIII, 3.44 ± 0.2 (3.15–3.75); LTIII, 17.63 ± 0.8 (16.8–19.05); Ltars 1-III, 4.99 ± 0.29 (4.65– 5.4); OL, 13.45 ± 0.88 (12.3–14.4).

Figures

FIGURE 6. Eidmanacris larvaeformis (Chopard). Male and female topotypes. A — male head, frontal; B — male head, pronotum and FW, lateral; C — male head, pronotum and FWs, dorsal; D — male abdomen, dorsal; E — female habitus; F — posterior femur; G — maxillary palpus; H — male metanotum, dorsal; I — male metanotum, lateral; J — male supra anal plate; K — male subgenital plate; L — female supra anal plate; M — female subgenital plate; N ovipositor, dorsal; O — ovipositor, ventral. Scale bar: A – F: 2 mm; G – O: 1 mm.

FIGURE 7. Eidmanacris larvaeformis (Chopard). Paratype. Male phallic complex: A — dorsal; B — ventral; C — lateral. Scale bar: 0.5 mm.

FIGURE 8. Eidmanacris larvaeformis (Chopard). Male and female topotypes. Male phallic complex: A — dorsal; B — ventral; C — lateral. Female copulatory papilla: D — dorsal; E — ventral; F — lateral. Scale bar: 0.5 mm.